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A. T. HLBROWER. SUPPLEMENTAL TIGHTENER FOR PRINTERS QUOINS. No. 580,922.Patented Apr. 20, 1897.

UNITED STATES PATENT OFFICE.

ABRAHAM T, H. BROVVER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE UNION QUOINCOMPANY, OF SAME PLACE.

SUPPLEMENTAL TIGHTENER FOR PRINTERS QUOINS.

SPECIFICATION forming part of Letters IPatent No. 580,922, dated April20, 1897. Application filed September 30 1895. Serial No. 564,101. (Nomodel.)

To all whom it may concern:

Beit known that LABRAHAM T.H.BROWER, a citizen of the United States,residing at the city of Chicago, Cook county, Illinois, have inventedcertain new and useful Improvements in Supplemental Tighteners or Looksfor Printers Quoins, of which I do declare the following to be a full,clear, and exact description, reference being had to the accompanyingdrawings, forming a part of this specification.

The present invention has for its object to provide improved meanswhereby the pairs or sets of quoins commonly used by printers forlocking the type-forms within the chases can be so tightened and lookedthat all danger of the slipping of the quoins and constant loosening ofthe type-form will be avoided.

The invention is adapted more particularly for use in connection withthat class of printers metallic quoins each pair of which comprises twowedge-shaped bodies having their abutting incline faces formed withrack-bars adapted to be engaged by a suitable key in order to shift thewedges with respect to each other, and thus effect the locking of thetypeform within the chase. In Letters Patent No. 413,166, granted to meOctober 2, 1889, is shown an example of this type of printers quoin. Inthe finer classes of job-work, particularly where the printing is donein a variety of colors and the most exact register is required, it isimportant that when the type-form has been locked up there shall be noeasing or loosening of the form, even to a slight extent, because whenthis occurs the exact register of the printing is destroyed.

By my present invention all danger of the quoins'slipping and allowingthe type-form to ease or loosen after it has been locked up iseffectively guarded against, and by this invention also an additionalrelative shifting of the quoins to more tightly look the typeform canalso be had when found desirable.

The invention consists, primarily, in a supplemental tightener or lookfor printers quoins, comprising a body having a part that is adapted toengage one of a pair of quoins, in combination with a pressure device ormechanism for engaging other of said quoins, so that when the type-formhas been locked up the quoins can with certainty be retained in theirlocked position against danger of slipping or becoming loose.

The invention also consists in various novel features of constructionthat will be hereinafter described, illustrated in the accompanyingdrawings, and particularly pointed out by claims at the end of thisspecification.

Figure 1 is a plan view of a printers chase and type-form having myinvention applied thereto. Fig. 2 is a perspective view of one form ofmy improved supplemental quoin tightener or look. Fig. 3 is aperspective view of the tightener or look shown in Fig. 2, but takenfrom the opposite side. Fig. 4 isadetailplan viewof one of a pair ofquoins. Fig. 5 is a detail perspective view of a slightlymodified formof my improved quoin lock or tightener. Fig. 6 is a perspective view ofthe device shown in Fig. 5, this view being taken from the oppositeside. Fig. 7 is a view in side elevation (parts being shown inlongitudinal section) of a pair of quoins having the form of myinvention illustrated in Figs. 5 and 6 applied thereto. Fig. 8 is aperspective view showing the form of key that will be used with thedevices illustrated in Figs. 2 and 5. Fig. 9 is a perspective view of amodified form of the invention. Fig. 10 isa View in longitudinal sectionthrough the form of the invention illustrated in Fig. 9. Fig. 11 is aview in horizontal section on line 11 11 of Fig. 10.

A designates the chase wherein the type is held, and B denotes thereglet or like furniture about the form. C C denote the wedgeshapedsections of a pair of quoins, one of which sections is illustrated inplan in Fig. 4 of the drawings. The inner faces of the quoinsections Cand C are formed with the rackbars 0 and with the open spaces 0, thesespaces serving to permit the insertion of the usual keys whereby thequoins will be shifted to lock and unlock the form in manner wellunderstood in the art.

The form of my improved quoin lock or tightener illustrated in Figs. 1,2, and 3 comprises a body D, having a part or projection d, adapted toengage with one of the quoins, and preferably this projection 01 is ofsuch size and shape that it will enter between the teeth of therack-bars 0 upon the inner faces of either of the quoins. By preferencealso the body D has a rearward extension (1, adapted to rest upon theteeth of the rack-bar c. Preferably also the body D is formed ofapproximately the same width of the larger end of the quoin, so that alldanger of the part or extension (1 rising from out the teeth of thequoin will be avoided. The bodyD is formed with a threaded perforation,through which passes a correspondinglythreaded screw E, the outer end ofwhich has a head e with projections that enable it to be firmly engagedbya suitable key or wrench F. (See Fig. 8.) It is manifest that anyconvenient shape may be given, however, to the head of the screw E, andany suitable form of key or wrench may be employed for operating thisscrew. By preference also the body D is formed with a groove (1 thatwill set over the rib 0 that is usually formed at the end of therack-bar c in the type of quoin illustrated. From the foregoingdescription itwill be seen that after the quoin-sections O C have beenshifted by means of the usual keys, so as to lock up the type-form, thequoin lock or tightener D will be dropped into place with its part orextension 01 entering between the teeth of the rack-bar immediatelybehind the larger end of one of the quoins. The screw E will then beturned by the key or wrench F, so that the free end of the screw shallbear tightly against the quoin O and thus securely lock itagainstaccidental slippingor yielding with respect to the quoin C. Ifdesired, also, the screw E may be used for more tightly locking up thetype-form, since as this screw is advanced the quoin C will be shiftedupon its companion quoin C. p

In the form of my invention illustrated in Figs, 5, 6, and 7 the body Dof the supplemental quoin lock or tightener is shown as provided with athreaded opening to receive a screw like the screw E, (illustrated inFigs. 1, 2, and 3-,) but in this form of the invention the body D is notso broad as in the form shown in the precedingfigures of the drawings.The body D in this last form, as in that previously described, isprovided with a part or extension 01 adapted to engage one of thequoins, and is provided also with a shallow extension 01 adapted toenter the groove 0 that is formed in the inner face of the larger end ofthe quoin, as more particularly shown in Fig. 7 of the drawings. Bypreference a groove d is formed on the inner face of the body- D, thisgroove permitting the body to pass over the rib 0 upon the inner face ofeach of the quoins C and 0'. It

will be observed that in this last form of my invention the part orextension clthat engages with one of the quoins is at the outer end ofthe bodyD instead of at the inner end, as in the form of the inventionillus-' trated in Figs. 1, 2, and 3. The extension d settingwithin thegroove 6* of the quoin, serves to prevent the part or extension cl fromslipping out of engagement with the rack-bar c as the screw E is turned.In the use of this form of my invention after the quoins C C have beenshifted in the usual manner to lock up the type-form the body D will beinserted adjacent the larger end of one of the quoins, with theextension d projecting slightly within the groove 0 and with the part orextension 01 engaging the teeth of the rack-bar 0. With the parts inthis position the screw E will be turned by means of a suitable wrench,such as that shown in Fig. 8, so as to securely lock the quoins inposition or, if desired, further shift the quoins with respect to eachother, in order to more tightly lock up the form of type.

In the form of the invention illustrated in Figs. 9, 10, and 11 thebodyD of myimproved quoin lock or tightener is formed with a part orextension d, adapted to engage one of the quoins, and, as in thepreceding forms of my invention, is provided with apressure device -toinsure the locking of the quoins or their additional shift, if required.In this form of the invention the body Dis chambered to receive asliding push-bar G, that has a circular opening g formed therein, andthrough this circular opening 9 passes a shaft H, having an eccentricportion h, that will engage with the push-bar G and thus advance orretract this bar according as the shaft isturne'd. Preferably the shaftH is retained in place by a pin K, passing through the body 1) andthrough an annular groove h formed adjacent one end of the shaft, and inorder to permit the shaft to be readily turned its ends are formed withgrooves its to receive a screwdriver orlike tool.

From the foregoing description it will be seen that when the form of theinventionillustrated in Figs. 9, 10, and 11 is to be employed the body Dwill be placed imposition immediately behind the larger end of one ofthe quoin-s, so that the part or extension (1 shall enter between theteeth of one of the rack bars c,'the push-bar G being at such time inretracted position. Then by turning the shaft H the push-bar can beforced outward, so as to firmly bear against the end of the quoin andthus securely lock it against all danger of accidental slipping. V

\Vhile I have illustrated in the drawings I several forms of myinvention, it is manifest that the details of construction can bevariedwithin wide limits without departing from the spirit of the invention,and I do not wish,

therefore, that the invention should be understood as restricted to thedetails of the structure set forth, except where such detailsrespecificallyrecited in the following claims.

Having thus described the invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A supplemental lock or tightener for printers quoins separable from,the body of said quoins and-having a part adapted to engage one of theopposing faces of a pair of IIO quoin-sections at a point beyond theother of said sections and having a pressure device for engagement withthe end of the other of said quoin-sections, substantially as described.

2. A supplemental lock or tightener for printers fquoins comprising abody separable from said quoins and adapted to set Within the space atthe end of the quoin-sections and having a part adapted to engage one ofthe opposing faces of the quoin-sections at a point beyond the other ofsaid sections and being provided with a pressure device carried therebyindependently of the quoins and adapted to engage the end of the otherof said quoinsections, substantially as described.

3. A supplemental lock or tightener for printers quoins comprising abody independent of said quoins and adapted to fit Within the space atthe end of the quoin-section and having a part adapted to engage withone of the opposing faces of the quoin-sections and having a pressuredevice arranged to bear against the end of the other quoin-section,substantially as described.

4. A supplemental lock or tightener for printers quoins comprising abody D provided with a projection 01 adapted to engage with one of theopposing faces of a pair of quoins, said body and its projection beingadapted to fit in the space at the end of the quoin-sections and saidbody carrying a pressure device arranged to engage the outer end of oneof the quoin-sections, substantially as described.

5. A supplemental lock or tightener for printers quoins comprising abody having a part or extension adapted to engage one of a pair ofquoins and having a screw arranged to engage the end of the other ofsaid pair of quoins, whereby the relative shift of the quoins may beeffected, substantially as described. I

6. A supplemental lock or tightener for printers quoins comprising abody D separable from the quoins and adapted to fit within the space atthe end thereof and having a part or extension d adapted to engage withone of a pair of quoins, a screw E passing through said body D andarranged to bear upon the end of the other of said quoins, said screwhaving its end formed to receive a suitable Wrench or key, substantiallyas described.

ABRAHAM T. H. BROWER.

Witnesses:

GEo. P. FISHER, J r., FRED GERLAOH.

